Top HRC Coupling Suppliers in India (2026)

Top HRC coupling suppliers in India for 2026 — compare SMI and other Ahmedabad/Mumbai makers, HRC 070–230 sizes, applications, and Fenner-compatible alternatives.

HRC couplings (taper-bush jaw couplings with a flexible rubber/cast spider) are among the most common general-purpose couplings for pumps, fans and conveyors. This 2026 guide compares leading Indian HRC suppliers and the standard HRC sizing buyers search for.

Company details are compiled from public records and IndiaMART/TradeIndia listings (2026); verify certifications directly. Brand names are used for compatibility reference only — SMI couplings are independently manufactured alternatives, not genuine OEM parts.

Quick Answer

Super Mech Industries (SMI), Ahmedabad supplies taper-bush HRC couplings across HRC 070–230 with verifiable ISO 9001:2015 + ZED certification. Other suppliers include Flexitech Industries, Shree Shakti Industries (Ahmedabad), and MSB Power Transmission / Asar Engineering (Mumbai).

Comparison

Standard HRC sizes

HRC couplings follow the well-known series: HRC 070, 090, 110, 130, 150, 180, 230 — defined by bore range and torque. SMI stocks the full range with taper-bush fitting and custom bores.

How to choose

• Select by torque + bore + RPM; HRC is for general-purpose, low-to-medium shock duty.
• Taper bush makes mounting/removal easy — confirm bush type (1008–3030).
• Verify the supplier's ISO certificate.

What an HRC coupling is, and where the name comes from

HRC is a size series, not a brand. An HRC coupling is a jaw-type flexible coupling: two cast iron hubs with jaws, a flexible element between them, and — in the common taper-bush form — a taper bush in each hub to grip the shaft. It is the workhorse of general industrial drives in India: pumps, fans, blowers, small conveyors and compressors.

Its appeal is practical rather than technical. It is inexpensive, it fits and comes off in minutes with a taper bush, the element is a stocked consumable, and there is nothing to lubricate.

Reading the size series

The series runs HRC 070, 090, 110, 130, 150, 180 and 230. Each step defines a torque capacity and a bore range. Two rules to apply when selecting:

• Select on service-factored torque, not motor kW. Calculate T = 9,550 × kW ÷ RPM at the coupling, then multiply by the duty factor — roughly 1.0 to 1.25 for smooth centrifugal loads, 1.5 for compressors and conveyors, higher for anything that starts under load or reverses.
• Then check the bore range. If your shaft sits at the very top of a size's bore range, the hub wall left behind is thin. Move up one size rather than machining to the maximum.

Taper bushes: the part that confuses buyers

A taper bush is a split, tapered sleeve that sits between the hub bore and the shaft. Tightening the screws draws the taper in, contracting the split sleeve onto the shaft for a genuine interference grip. Bushes are designated by a four-digit code such as 1008, 1108, 1210, 1610, 2012, 2517, 3020 or 3030 — the first two digits relate to the bush's nominal diameter and the last two to its length, both in inches.

Two practical consequences:

• One hub size accepts one bush size, but that bush is available in many bores. That is the whole point — you can standardise on one coupling and stock several bushes for different shaft sizes.
• Fit it dry. No grease, no anti-seize on the taper faces. Lubricant on a taper is the main reason bushes slip under load. Tighten the screws progressively and evenly, run briefly, then re-check them.

Tell us the bush number if you already know it. If you do not, send the shaft diameter and we will specify both the coupling size and the correct bush.

How to evaluate an HRC supplier — beyond the price list

Most HRC quotes in India land within a narrow band, so price alone is not a useful discriminator. These questions are:

1. Ask for the ISO certificate number and the certifying body, then verify it. "ISO certified" on a listing page is a claim; a certificate number you can check is evidence.
2. Ask who machines the bore. A supplier who machines in-house can hold your shaft tolerance and keyway. A trader sending work out adds a week and a second party to blame.
3. Ask about element availability in three years. The flexible element is the consumable. A supplier who cannot commit to supplying elements for the size they are selling you is selling you a disposable coupling.
4. Ask for the actual lead time for your bore, not the catalogue lead time for a stock item.
5. Ask what else they make. A supplier with a single product line will fit an HRC to your drive whether or not it belongs there. One with a full coupling range has no reason to.
6. Ask about test and inspection documentation if your plant needs it — material certificates and dimensional reports should be available on request, not a special favour.

Where HRC is the right choice — and where it is not

For a full family comparison see our coupling selection guide.

Installation and failure modes

• Align properly. The element forgives residual error; it does not replace alignment. Misalignment is absorbed by the element flexing every revolution, which heats it internally.
• Set the gap between hub faces to the specified figure. Too tight and thermal growth pushes thrust into both bearing sets.
• Element shredded — torque overload or a duty factor that was never applied.
• Element hard and cracked — heat, from ambient or from misalignment.
• Bush slipping on the shaft — grease on the taper, screws never re-checked after first run, or a worn shaft.
• Jaws peened — the coupling has run metal-to-metal after an element failure. Replace the hubs too.

What to send us for an HRC quote

1. Motor kW and RPM.
2. Both shaft diameters and keyway sizes — measured.
3. Driven machine and duty, plus starts per hour.
4. HRC size and taper bush number if you already know them.
5. Ambient temperature and any oil exposure.
6. Complete couplings, or elements and bushes only?
7. Quantity and delivery location.

More questions on this

What do the taper bush numbers like 1610 or 2517 mean?

They are standard bush designations where the first two digits relate to nominal diameter and the last two to length, in inches. One hub size takes one bush size, but that bush is available in many bores — which is what lets you standardise on a coupling and stock several bushes for different shafts.

Should I grease a taper bush before fitting?

No. Fit it completely dry — no grease and no anti-seize on the taper faces. Lubricant on a taper is the main reason bushes slip under load. Tighten the screws progressively and evenly, run briefly, then re-check them.

How do I compare HRC suppliers when the prices are all similar?

Ask for the ISO certificate number and verify it, ask who machines the bore, ask whether they will still supply elements in three years, ask the real lead time for your bore rather than the catalogue figure, and ask what else they manufacture — a single-product supplier has an incentive to fit an HRC where it does not belong.

Is an HRC coupling suitable for a crusher or mill?

No. HRC is a general-purpose, low-to-medium shock coupling. For crushers, mills and other heavy shock duties, use a gear coupling or a grid coupling.

Contact SMI for HRC sizing or a quote.

Super Mech Industries — Odhav, Ahmedabad, Gujarat 382415, India. Phone: +91 63510 70577. Email: smigvs@gmail.com. ISO 9001:2015 certified.